I've reached an impasse in the story gameplay for Kingdom Hearts Unchained:

As you can see, two rounds and the level is over, at which point you have to quit to start again.There is an option to pay ingame currency to continue, but with the high amount of health bars this boss has and the fact the ingame currency is purchased with real world currency means I don't dare use that as a solution!

I'm uncertain of the reasoning behind making a boss that is simply unbeatable, it's not good gameplay.